Cause:
DCE's OVA (virtual applaince) has an expired certificate used for validation which prevents the OVA from deploying when using the vSphere flash client.

Resolution:

Deploy the OVA using the HTML5 vSphere client. You will be prompted to deploy the OVA and will have the option to ignore the expired certificate. This will be resolved in the next release of StruxureWare DCE (7.6)